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AutoCodes – Toyota – P0305 2009 Toyota Camry

P0305 2009 Toyota Camry Code - Cylinder 5 Misfire Detected

Quick Answer

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Common causes include Faulty spark plug 5, Clogged or faulty fuel injector 5, Faulty ignition coil 5. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0305 2009 Toyota Camry indicates Cylinder 5 Misfire Detected.
Common causes
Common causes include Faulty spark plug 5, Clogged or faulty fuel injector 5, Faulty ignition coil 5.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 4,631
How popular is this code, among other codes? Low
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Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0305 2009 Toyota Camry Description

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Extremely high HC concentration levels can cause increases in exhaust emission levels. High concentrations of HC can also cause increases in the Three-Way Catalytic Converter (TWC) temperature, which may cause damage to the TWC. To prevent these increases in emissions and to limit the possibility of thermal damage, the ECM monitors the misfire rate. When the temperature of the TWC reaches the point of thermal degradation, the ECM blinks the MIL. To monitor misfires, the ECM uses both the Camshaft Position (CMP) sensor and the Crankshaft Position (CKP) sensor. The CMP sensor is used to identify any misfiring cylinders and the CKP sensor is used to measure variations in the crankshaft rotation speed. Misfires are counted as when the crankshaft rotation speed variations exceed predetermined thresholds. If the misfire rate exceeds the threshold level, and could cause emission deterioration, the ECM illuminates the MIL and sets a DTC.
OBDII Code P0305 2009 Toyota Camry - Cylinder 5 Misfire Detected - AutoCodes.com
P0305 2009 Toyota Camry Code - Cylinder 5 Misfire Detected
What does this mean?

What are the Possible Causes of the DTC P0305 2009 Toyota Camry?

  • Faulty spark plug 5
  • Clogged or faulty fuel injector 5
  • Faulty ignition coil 5
  • Fuel injector 5 harness is open or shorted
  • Fuel injector 5 circuit poor electrical connection
  • Ignition coil 5 harness is open or shorted
  • Ignition coil 5 circuit poor electrical connection
  • Insufficient cylinder 5 compression
  • Incorrect fuel pressure
  • Intake air leak

How to Fix the DTC P0305 2009 Toyota Camry?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

The P0305 code means that the cylinder 5 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 5. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes"

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0305 2009 Toyota Camry code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0305 2009 Toyota Camry code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0305 2009 Toyota Camry Code

1. What does the OBDII code P0305 mean on a 2009 Toyota Camry?

P0305 indicates a misfire has been detected in cylinder 5 of your engine.

2. What are the common symptoms of a P0305 code?

Symptoms include rough idling, poor acceleration, reduced fuel efficiency, and, in some cases, the Check Engine Light will illuminate.

3. What causes a cylinder 5 misfire in a 2009 Toyota Camry?

Common causes include a faulty spark plug, a bad ignition coil, a clogged fuel injector, low engine compression, or a vacuum leak near cylinder 5.

4. Can I drive my car with a P0305 code?

Driving with a P0305 code is not recommended as it can cause further damage to the engine and catalytic converter if the misfire persists.

5. How do I diagnose a P0305 code?

Start by inspecting the spark plug, ignition coil, and fuel injector for cylinder 5. Check for vacuum leaks, test fuel pressure, and perform a compression test if needed.

6. How can I fix a P0305 code on a 2009 Toyota Camry?

Repairs may include replacing the spark plug or ignition coil for cylinder 5, cleaning or replacing the fuel injector, repairing vacuum leaks, or addressing low compression issues.

7. How much does it cost to fix a P0305 code?

The cost depends on the issue. Replacing a spark plug or ignition coil can cost $100-$300, while more complex issues like fixing engine compression can be significantly more expensive.

8. Can a dirty air filter cause a P0305 code?

While unlikely, a severely clogged air filter could restrict airflow and contribute to misfires. It’s worth inspecting and replacing if necessary.

9. Will resetting the Check Engine Light fix the P0305 code?

Resetting the light will clear the code temporarily, but if the underlying issue isn’t fixed, the code will return.

10. How can I prevent a P0305 code from occurring?

Regular maintenance, such as replacing spark plugs, inspecting ignition coils, and ensuring clean fuel injectors, can help prevent misfires.

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